added function to check whether working dir can be safely unmounted, added the...

added function to check whether working dir can be safely unmounted, added the possibility to delete existing image, creating default flavors if they are missing

create-arista-veos-image/create-arista-veos-image.sh

 #!/bin/bash
-# create-arista-veos-image.sh V1.2
+# create-arista-veos-image.sh V1.3
 # HS-Fulda - sebastian.rieger@informatik.hs-fulda.de
 #
 # changelog:
@@ -7,6 +7,8 @@
 # V1.11  fixed device mapping of extracted partitions, fixed problems with stale swi directory
 # V1.12  rc.eos now supports e1000 and virtio as vnic types (virtio is supported in vEOS >=4.14.5F)
 # V1.2   added dynamic handling of device mapping of extacted partitions
+# V1.21  checking whether it safe to unmount working directories
+# V1.3   added support to delete existing image with the same name and generating the default nova flavor
 
 # usage
 if [ ! $# -eq 3 ] ; then
@@ -30,6 +32,42 @@ GLANCE_IMAGE_RELEASE=$VEOS_VMDK_BASENAME-$ABOOT_SERIAL_ISO_BASENAME
 TMP_NAME="vEOS-$GLANCE_IMAGE_RELEASE"
 TIMESTAMP=$(date +%Y%m%d%H%M%S)
 
+function safe_unmount() {
+  echo -n "Unmounting $1..."
+  RETRY=0
+  until umount $1 &>/dev/null
+  do
+    echo -n "."
+    sleep 1
+    RETRY=$((RETRY+1))
+    if [ "$RETRY" -ge "5" ] ; then
+      echo
+      echo "ERROR: unable to unmount working directory $1"
+      exit 1
+    fi
+  done
+  echo
+  return 0
+}
+
+# check for an existing image with the same name and offer to delete it prior to creating a new one
+CHECK_FOR_EXISTING_IMAGE=$(glance image-show $GLANCE_IMAGE_NAME 2>&1)
+if [ $? == 0 ] ; then
+  glance image-show $GLANCE_IMAGE_NAME
+  echo
+  echo
+  read -r -p "There is already an image with the same name in glance. Do you want to overwrite it? [y/N] " RESPONSE
+  if [[ $RESPONSE =~ ^([yY][eE][sS]|[yY])$ ]] ; then
+    echo "Deleting existing image $GLANCE_IMAGE_NAME..."
+    echo "==========================================================="
+
+    glance image-delete $GLANCE_IMAGE_NAME
+  else
+    echo "An image with the same name already exists. Either delete this image or choose another name."
+    exit 1
+  fi
+fi
+
 echo
 echo "Creating vEOS image..."
 echo "==========================================================="
@@ -92,7 +130,9 @@ cp /mnt/flash/startup-config.tmp /mnt/flash/startup-config
 EOF
 chmod 755 rc.eos
 cd ..
-umount swi-$TIMESTAMP
+
+safe_unmount swi-$TIMESTAMP
+
 rm -rf swi-$TIMESTAMP
 
 echo
@@ -157,7 +197,26 @@ rm $VEOS_VMDK_BASENAME.raw
 echo
 echo "Importing image into glance..."
 echo "==========================================================="
-glance image-create --container-format bare --disk-format qcow2 --is-public true --name $GLANCE_IMAGE_NAME --file $TMP_NAME.qcow2 --property hw_disk_bus=ide --property serial=1 --property hw_vif_model=e1000 --property hw_cdrom_type=ide --property release="$GLANCE_IMAGE_RELEASE" --property subtype=IOSv --property config_disk_type=disk
+glance image-create --container-format bare --disk-format qcow2 --is-public true --name $GLANCE_IMAGE_NAME \
+  --file $TMP_NAME.qcow2 --property hw_disk_bus=ide --property serial=1 \
+  --property hw_vif_model=e1000 --property hw_cdrom_type=ide --property release="$GLANCE_IMAGE_RELEASE" --property subtype=IOSv --property config_disk_type=disk
+
+# create default flavor
+CHECKING_FOR_EXISTING_FLAVOR=$(nova flavor-show vEOS.small 2>&1)
+if [ $? == 1 ]; then
+  echo "Creating default flavor vEOS.small..."
+  echo "==========================================================="
+
+  nova flavor-create --is-public true vEOS.small auto 1024 0 1
+fi
+CHECKING_FOR_EXISTING_FLAVOR=$(nova flavor-show vEOS.medium 2>&1)
+if [ $? == 1 ]; then
+  echo "Creating default flavor vEOS.medium..."
+  echo "==========================================================="
+
+  nova flavor-create --is-public true vEOS.medium auto 2048 0 1
+fi
+
 
 #testing:
 #